Clam-shell bucket.



J. F. MILLER.

CLAM SHELL BUCKET.

APPLICATION FILED JUNE 11,1913.

Patented Sept). 22, 1914.

2 SHEETS-SHEET 1.

IN "FM TOR Jasep/z Z/i'ZZen nvfld I WITNESSES:

IHE NORRIS PETERS CO PHOTU-LITHO. WASHINGIVN. D. C.

J. P. MILLER.

OLAM SHELL BUCKET.

APPLICATION FILED JUNE 11,1913.

1,11 1,71 9. Patented Sept. 22, 1914.

2 SHEETS-SHEET 2 IN V ENTOR Josep/zfifizien %2fdW rrouw HY WITNESSES:

THE AORRIS PETERS 50.. PHOTO-LITHQ, WASHINGTON. a. C

ToaZZ whom concern 1 i amen-S TES PAT NT OFFICE.

aosnrn nivnnmin, or sacnnivrniv'ro, CALIFORNIA.

'1 spejc ai l s eaten. Patented se t. 22, 1914.

l, Application flied nine 11,1913. seria1n0.773-,o4o.

Be it known that 1,-JOSEPI-t cation.

: This invention relates to a clam shell bucket; v p I It is the object of this invention to provide a clam shell bucket and means for operating 1- same, whereby the jaws ofjthe bucket" will be caused-to moveto their :closed position when loading before being, lifted.

A further" object "is to provide a cable operatedune'chanism for opening and closing f close "the clam shell buckets bytwhich the closing and thewelevatingjof the bucket will be elfected by a single cable," and in which the initial pull on the elevating cable will operate to Another object to provide a mechanism of the" above character which is simple in construction and eihcient in operation.

i i The invention primarily resides in providing 'the j aw s of clam "shell bucket with upwardlyextending operating farms, the arms of one jaw of the bucket crossing the armsl of the other jaw when the bucket is iIiwBitllGf its closed or open position,

' mounting pulley sheavleson the outer ends of said arms, reeving a-haulingcable'around said sheaves and-"securmg lts end in such manner that aniinitial pull on the hauling cable will operate :to close the jaws ofthe bucket, and as the aws are closed will op crate to lift the bucket.

1 The, invention further consists of the parts and the. construction and combination of parts as hereinafter more fully described and claimed, having reference to the accomp y ng. dravingsfi nwhich+ Figure 1 is a side rview ofthe invention showing the jaws of "the bucket :in their open; position in full: lines, and in their closed position in dotted, lines. Fig; 2 ,is a

1 I r sectionand elevation on the line a-'-a of fied form of the invention, showing the Fig; 1; Fig. 3 is a side elevation of a modi- F'. ,TMZILLER, a citizen of the United States,,residing at Sacramento, in the countyof sacrament, I and State of California, have inventednew and ruseful i'Improvements" in fGlam 1 Shell Buckets,-of which the following is a specifi-i jaws of the bucket before exerting anupwardwpullfthereon.

, the outer end of an arm 2 bucket n its closedposition in full lines, and in its open position in dotted lines.

In the drawings A and B indicate the jaws of an ordinary clam shell bucket, on the sides or. endsof which arms 2 and 2' are rigidly mounted; the arms 2 and 2 being pivotally connected together at 3. The arms 2 and 2 are so shaped'thatj when the jaws A and B ofthe bucket are in either their closed or open position, the arm s'2 and 2,willcr0ss each other at or above. their pivotal connection 3, so that an inward upward movement of the outer ends of the; arms will cause the jaws A and B to move to their closed position. i i

Mounted on the outer ends 2 and 2 are sheaves 4, a pair of sheaves i being provided on each of the armsf'2 and 2.

In the form of the invention shown in Figs. Land 2, the sheaves 4 are revolubly iCLILiAMFS HE LE BUGKET. i

of the arms ,mounted. on stud shafts" 5, carried by the arms2 and 2; and in the form of theinvention shown in Fig.13, the sheaves 4y are mounted on stud shafts 5supportedon links 6, pivotedv to the ends of the armsg2and A hauling cable .7 leading from any suitable operating mechanism, not shown, and passing over a direction pulley 8 on a boom 9, is rove around the sheaves-4 on the arms 2 and2, and has its outer end rigidly secured to any suitablepoint. i

In the form of the inventionshown in Fig. 1, the hauling. cable"? passes around and under adirection roller 10, carried on the outer ends of arms 11, pivoted on the shaft 5, onthe arm 2; the hauling cable 7 after passing over the direction roller. 8, and'before passing under thesheaves-L on the] arm 2. The cable 7, after passing around the sheave on the arm 2, is rove around the sheave 4 on the arm -2, and thence back and forth around as manysheaves 4 as may be mounted on the arms 2 and 2, the

end. of the cable 7 being secured at 12 to As a means for preventing the direction pulley 1O and arms 11 from fouling the cable the outer ends of the arms ll are connected to a yoke 13, attached to theend .of a cable 14, passing upward andover being rove around the direction pulley 1O v The pull of the cable 19 will operate to move being let out to permit spreading movement ofa cable 19 which passes over a direction direction wheels 15 on the boom 9, andl connected at its other end to a counter weight 16. The weight 16 operates to nor:- mally exert an upward pull on the arms 11, thereby preventing the latter from dropping downward when the hauling. cable a is, slackened, thus keeping it from becoming entangled with the portion of the cable 7 extending between the outer ends of the armsQ and 2. v v r In the form of the invention shown in Fig. 3, the direction pulley 10 is dispensed with; the hauling cable 7 passing under the sheave i on the arm 2, thence under and around a sheave 4 on the M1112, back, over and under a second sheave '4: on the arm 2, thence under and'around a second sheave 4 on the arm 2, the outer end of the hauling cable 7 in this case being attached to the boom9. Y

Connecting with the jaws A and B, adjacent to their outer edges, are short cables 17'which connect at their outer ends to a ring 18. The ring 18' is secured to the end wheel 20 on the boom,9, and leads to any suitable operating means.-

Let it be assumed that the jaws A and B of the bucket are in their open position, as shown in; Fig. 1, and that a pull is exerted on the hauling cable. 7 in the direction of the arrow 6. The operation will then be as follows: The pull exerted on the cable 7 will be transmitted to the outer ends of the arms 2 and 2 in such direction as to move the arms 2"and' Qupward and toward each other, as indicated by the arrows'c, on their} pivotalconnection '3; this movement of the arms '2 and 2" acting to advance'the lower edges of the jaws A and B toward each other, as indicated by the arrows Z. The and B in. advancing toward each other are caused to' enter the earth sl1ovel fashion by reason of the weight of the bucket being supported by the ground; the cable 19 being slackened during this operation When the jaws A and B have closed together, further inward movement of the arms '2 and 2 will be prevented, so that a continued pull on the cable 7 will operate to elevate the bucket with its load, the bucket being elevated by the cable 7 and moved to any suitable point of discharge by swinging the boom 19 in the usual manner. To open the bucket, the releasing cable 19 is drawn taut and the hauling cable 7 is slackened.

the jaws A and B to their open position, thus discharging the contents of the bucket and restoring the arms 2. and 2 to their normal extended position;:-:'the hauling cable 7 j of the arms 2 and 2. Thebucket will then be supported on the .cable 19' and can be lowered into contact with the earth by letting out the cables 19 and 7, simultaneously.

By crossing the arms ofthe jawsmof the bucket and connecting their outer ends by ;means of a cable rove back'andforth over sheaves carried by the arms ,both jaws of the bucketwill be closed simultaneously by a single'cable; the pull exerted by the cable being. distributed'equallyto both jaws ofwhile I have shown a pair of sheayes' on "eacharm 2 and 2", this number may be increased or diminished as occasion may require; a larger numberbeing employed when greater leverage is Edesired. Having-thus described my Invention, what entisz' 1. In 'a clam shell bucket, a pair of jaws,

operating means comprising pivotally connected arms, each jaw having-a pair of arms rigidly connected thereto on opposite sides I claim and desire to secure by Letters Patthereof, sheave carrying means for each jaw connected to eachof the arms of the respective jaws, and a single combined hoisting and jaw closing cablesecured [at one end to a stationary pointand being rove back and forth and around the sheaves and adapted to have its opposite end operatedto draw the arms together tov close'thejaws of the bucket.

, 2. In a clam shell bucket, a' pair of jaws,

an arm rigidly connected to each ,jaw, the arm of one jaw being pivoted -.to thearm of the other jaw, the arms crossingeach-other above said pivotal point,.sheaves'carried on the outer ends of the arms, a single hauling cable rigidly secured at oneen'dwto a stationary point and being rove around the sheaves and having its opposite ends adapted to be operated to draw the arms-together to close the jaws, with the last-named end ofth'e cable, means to movably support the directionroller from one of said arms, and a counter-balanced cable having one end connected to said supa direction roller engaged porting means to hold same-inan'upright position out of engagement'withsaidlast named arm during the opening and closing movements of said arms. r i

3. In a clam shell bucket, apairf of jaws,-

an arm rigidly connected to, each jaw, the

arm ofione jaw being pivoted to thejarmof the other jaw, ends of the arms, a singlehaulingcable sheaves, carried on the outer i rigidly secured at one en'd to a stationary Y point and being rovea'round the sheaves and having its opposite end adapted beep- .erated to draw the arms together'tdclose the In testimony whereof I have hereunto set jaws, means movably eonneetedito the outer my handin the presence of two subscribing end of one arm for engagement with the witnesses. last; named end 'of the cable, andmeansto 5 hold said means in an upright position durl. ingthe opening and closing movements of the arms. 1 f

I "JOSEPH F. MILLER.

Witnesses:

CHAS. F; GRONDONA, MARTIN EUPHRAT.

flepiesof this patent may be qbtaine d fer fine cenfs each, by addressing the Commissioner of Patents, I H Washington, D. 6.? 

